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obsidian

noun

/əbˈsɪdiən/

Meaning

A hard, dark, glasslike volcanic rock formed by rapid solidification of lava.

The knife was made from sharp obsidian.

volcanic glass, lava glass, natural glass, igneous rock

sandstone, limestone

obsidian blade, obsidian tool, black obsidian, polished obsidian

A strong liking or preference for something.

an act of jumping; a sudden movement upwards or forwards

A settled or regular tendency or practice, especially one that is hard to give up.

The method and practice of teaching, especially as an academic subject or theoretical concept.

a person's hand when the fingers are bent in toward the palm and held there tightly

a scientist who studies or specializes in physics